<template>
    <header class="header">
        <!-- 头部的第一行 -->
        <div class="top">
            <div class="container">
                <div class="loginList">
                    <p>尚品汇欢迎您！</p>
                    <p v-if="!username">
                        <span>请</span>
                        <!-- <a href="###">登录</a>
                        <a href="###" class="register">免费注册</a> -->

                        <!-- 声明式导航:务必要有to属性 -->
                        <router-link to="/login">登录</router-link>
                        <router-link class="register" to="/register">
                            免费注册
                        </router-link>
                    </p>
                    <p v-if="username">
                        <span>欢迎</span>
                        <!-- <a href="###">登录</a>
                        <a href="###" class="register">免费注册</a> -->

                        <!-- 声明式导航:务必要有to属性 -->
                        <a>{{ username }}</a>
                        <a class="logout" @click='logOut'>
                            退出登录
                        </a>
                    </p>
                </div>
                <div class="typeList">
                    <router-link to='/center'>我的订单</router-link>
                    <router-link to='/shopcart'>我的购物车</router-link>
                    <a>我的尚品汇</a>
                    <a>尚品汇会员</a>
                    <a>企业采购</a>
                    <a>关注尚品汇</a>
                    <a>合作招商</a>
                    <a>商家后台</a>
                </div>
            </div>
        </div>
        <!--头部第二行 搜索区域-->
        <div class="bottom">
            <h1 class="logoArea">
                <router-link class="logo" to="/home">
                    <img src="./images/logo.png" alt="" />
                </router-link>
            </h1>
            <div class="searchArea">
                <form action="" class="searchForm">
                    <input
                        type="text"
                        id="autocomplete"
                        class="input-error input-xxlarge"
                        v-model="keyword"
                        @keydown.enter.prevent="goSearch"
                    />
                    <button
                        class="sui-btn btn-xlarge btn-danger"
                        type="button"
                        @click="goSearch"
                    >
                        搜索
                    </button>
                </form>
            </div>
        </div>
    </header>
</template>

<script>
import { mapState } from "vuex";
export default {
    name: "Header",
    data() {
        return {
            keyword: "",
        };
    },
    computed: {
        ...mapState({
            username: (state) => state.User.userInfo.name,
        }),
    },
    mounted() {
        // 挂载之前绑定一个全局事件
        this.$bus.$on("clearKeyword", () => {
            this.keyword = "";
            console.log(this.$bus);
        });
    },
    beforeDestroy() {
        // 销毁时解绑全局事件
        this.$bus.$off("clearKeyword");
    },
    methods: {
        // 搜索按钮的回调函数向search路由进行跳转
        goSearch(e) {
            // 路由传递参数
            // 第一种，字符串形式
            /* this.$router.push(
                `/search/${this.keyword}?k=${this.keyword.toUpperCase()}`
            ); */
            // 第二种，对象的写法
            let location = {
                name: "Search",
                params: { keyword: this.keyword || undefined },
                query: this.$route.query,
            };
            this.$router.push(location);
        },
        async logOut(){
            // 退出登录
            /* 
                1. 发送请求通知服务器退出登录   服务器清除一些数据例如[token]
                2. 清除项目中的数据 例如userInfo token
            */
            try{
                let res= await this.$store.dispatch('UerLogOut');
                alert(res);
                this.$router.push({
                    name:'Home'
                })
            }catch(e){
                alert(e.message);
            }
        }
    },
};
</script>

<style scoped lang="less">
.header {
    & > .top {
        background-color: #eaeaea;
        height: 30px;
        line-height: 30px;

        .container {
            width: 1200px;
            margin: 0 auto;
            overflow: hidden;

            .loginList {
                float: left;

                p {
                    float: left;
                    margin-right: 10px;

                    .register,
                    .logout {
                        border-left: 1px solid #b3aeae;
                        padding: 0 5px;
                        margin-left: 5px;
                        cursor: pointer;
                    }
                }
            }

            .typeList {
                float: right;

                a {
                    padding: 0 10px;

                    & + a {
                        border-left: 1px solid #b3aeae;
                    }
                }
            }
        }
    }

    & > .bottom {
        width: 1200px;
        margin: 0 auto;
        overflow: hidden;

        .logoArea {
            float: left;

            .logo {
                img {
                    width: 175px;
                    margin: 25px 45px;
                }
            }
        }

        .searchArea {
            float: right;
            margin-top: 35px;

            .searchForm {
                overflow: hidden;

                input {
                    box-sizing: border-box;
                    width: 490px;
                    height: 32px;
                    padding: 0px 4px;
                    border: 2px solid #ea4a36;
                    float: left;

                    &:focus {
                        outline: none;
                    }
                }

                button {
                    height: 32px;
                    width: 68px;
                    background-color: #ea4a36;
                    border: none;
                    color: #fff;
                    float: left;
                    cursor: pointer;

                    &:focus {
                        outline: none;
                    }
                }
            }
        }
    }
}
</style>